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Originally Posted by Mike Bortfeldt
I could be way off base, but I believe the accelerometer you are using outputs analog signals (0-5 V) and should be connect to an AI port, not a digital.
Mike
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The 202 outputs PWM signals.. I, next fall, was going to use the newer accelerometer that outputs analog signals, as the resulting output would be more useful, because of this particular processor (I didn't realize this person is at Clarkson, heh). So maybe you should just go right to investigating that one? Also, you can look at the setups from
http://www.sparkfun.com/shop/ , they could make your life a bit easier (unlike my headache this build).
edit: Actually, in hindsight, I do remember the 202's manual telling a way that the analog signal could be salvaged. I think it involved the use of a few capacitors. You can maybe read the manual, and see if that is a feasible option for you.
Also, the accelerometer I was mentioning is the 203: http://www.analog.com/en/prod/0%2C28...L203%2C00.html . It has about 2.5 times less error, and a more usable signal. Its the way to go.